[Mesa-users] Why the results are so mesh-sensitive?

[Matheus Bernini]

Hello everyone!

My name is Matheus, I'm an undergraduate student. I'm using MESA (r-9575)
to study the evolution of massive stars. I've noticed that the choose of
spatial resolution (mesh_delta_coeff) has a strong impact on the evolution
of my models. I've made tracks for one star (32M_sun, rotating, like
Ekstrom+2012) using differents meshes only [
https://drive.google.com/file/d/1cK0cuhJj9MYfd8bjnbfWrrfAahzsIWZc/view?usp=sharing
]. On this diagram (Mass x LogTeff) smaller mesh_delta_coeff's make the
tracks move to cooler regions (they keep evolving to LogTeff < 3.7) while
larger ones make them stay on warmer temperatures.

I'd like to know which mesh_delta_coeff I should use, and more important,
how can I know (on other cases) if my spatial resolution is correct? The
same for temporal resolution and mesh_delta_coeff_for high_T (although I've
tested them like that).




Thanks
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